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b26c7727c9
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7 Commits

Author SHA1 Message Date
Jakob Stoklund Olesen
b26c7727c9 Kill and collapse outstanding DomainValues. 
DomainValues that are only used by "don't care" instructions are now
collapsed to the first possible execution domain after all basic blocks
have been processed.  This typically means the PS domain on x86.

For example, the vsel_i64 and vsel_double functions in sse2-blend.ll are
completely collapsed to the PS domain instead of containing a mix of
execution domains created by isel.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144037 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-07 23:08:21 +00:00
Jakob Stoklund Olesen
a59ce03791 Use a reverse post order instead of a DFS order. 
The enterBasicBlock() function is combining live-out values from
predecessor blocks.  The RPO traversal means that more predecessors
have been visited when that happens, only back-edges are missing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144025 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-07 21:59:29 +00:00
Jakob Stoklund Olesen
25265d0e7a Extract two methods. No functional change. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144020 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-07 21:40:27 +00:00
Jakob Stoklund Olesen
d8f9f34230 MBB doesn't need to be a class member. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144015 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-07 21:23:42 +00:00
Jakob Stoklund Olesen
cd7dcad82a Fix pass name after the source was moved. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144014 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-11-07 21:23:39 +00:00
Jakob Stoklund Olesen
56ab875e55 Rename class and clean up source. 
No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140664 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 00:01:56 +00:00
Jakob Stoklund Olesen
d4d4fca9c3 Rename SSEDomainFix -> lib/CodeGen/ExecutionDepsFix. 
I'll clean up the source in the next commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140663 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-09-28 00:01:54 +00:00